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है”ह”ह

IS 9755 (2003): Textiles - High Density Polyethylene (HDPE)/ Polypropylene (pp) Woven Sacks for Packing Fertilizers[TXD 23: Textile Materials made from Polyolefins]

IS 9755:2003

m31-R-*&HR-l-$d%aG=mmiW* (F-=9.w.)pi’lc’mw’i ‘-f (gwit.)– mm

( a’k-nyi’t?m)

Indian Standard

TEXTILES — HIGH DENSITY POLYETHYLENE( HDPE )/POLYPROPYLENE ( PP ) WOVEN SACKS

FOR PACKING FERTILIZERS — SPECIFICATION

( Fourth Revision)

ICS 55,080:65.080

0 BIS 2003

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

June 2003 Price Group 3

Textile Materials Made from Polyolefins ( Excluding Cordage ) Sectional Committee, TX 23

FOREWORD

This Indian Standard ( Fourth Revision ) was adopted by the Bureau of Indian Standards, after the draft finalizedby the Textile Materials Made from Polyolefins ( Excluding Cordage ) Sectional Committee had been approvedby the Textile Division Council.

This standard was first published in the year 1981 and subsequently revised in 1985,1989 and 1999. This standardhas been again revised to incorporate the following major changes:

a) To specify ultra voilet resistance test for polypropylene sacks, and

b) To include various amendments issued to earlier version of the standard

The composition of the Committee responsible for formulation of this standard is given in Annex D.

For the purpose of deciding whether a particular requirement of this standard is complied with, the finalvalue, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance withIS 2: 1960 ‘Rules for rounding off numerical values ( revised )’. The number of significant places retained in therounded off value <fiould be the same as that of the specified value in this standard.

IS 9755:2003

Indian Standard

TEXTILES — HIGH DENSITY POLYETHYLENE

( HDPE )/POLYPROPYLENE ( PP ) WOVEN SACKSFOR PACKING FERTILIZERS — SPECIFICATION

(Fourth Revision )1 SCOPE

This standard prescribes the requirements of twotypes of HDPE/PP woven sacks suitable for packingfertilizers.

2 REFERENCES

The standards listed in Annex A contain provisionswhich through reference in this text constituteprovisions of this standard, At the time of publication,the editions indicated were valid. All standards aresubject to revision and parties to agreements basedon this standard are encouraged to investigate thepossibility of applying the most recent editions of thestandards indicated in Annex A.

3 MANUFACTURE

3.1 Fabric

The fabric used in the manufacture of HDPE/PP wovensacks shall be woven from HDPE/PP tapes havingwidth of2.5 mm ( see IS 6192 and IS 11197 ) and lineardensity of 111 tex ( 1000 denier ) for Type 1and 99.9 tex ( 900 denier) for Type 11sacks. The denierof HDPE/PP tape used in the manufacture ofwoven fabric/sacks shall be subject to the followingtolerances:

a) 10 percent on individual value, and

b) 5 percent on average.

3.2 Sacks

The sacks shall be produced from material woven asa tube on a circular loom and cut to the required length.

3.2.1 The constructional particulars of fabric usedfor conversion into sacks shall be as givenin Table 1.

3.3 Liner

If required by the buyer unlaminated sack shall beprovidedwith a loose linerof LDPE/ LLDPE/HMHDPE.The width of the loose liner shall be minimum 20 mmmore than the width of the sack. The thickness ofthe loose liner, when tested in accordance with A-2of IS 2508, shall be 70 pm + 10 percent in case ofLDPE/LLDPE and shall be 40 ~m * 10 percent in caseof HMHDPE/HDPE.

3.3.1 The liner shall be free from pin holes, patches,tears, blisters and any other visible defects. The plasticmaterial used for the liner shall be virgin.

3.3.2 The bottom seam of the loose liner shall be atleast 10 mm from the bottom edge.

3.4 Lamination

If required by the buyer, the fabric woven on circularloom before manufacture into sacks may be laminatedby coating with LDPE/LLDPE for HDPE sack andPP for PP sack of uniform thickness having mass of23 g/m2* 10 percent with a minimum overlap/overhangof5 mm.

3.4.1 The plastic material used for the lamination ofthe sacks shall be virgin.

3.5 Seam

The stitching of bottom seam shall be done with tworows of chain stitches ( see IS 10789 ). The two rowsof stitches shall be separated from each other byabout 5 mm and the outer stitch shall be approximately8 mm from the outer edge of the sack. The stitchingshall be done with single or double fold over scam toa depth of25 mm, so that the stitches pass through aminimum of four layers of the fabric. The number ofstitches/din shall be 14 + 2.

3.5.1 The material used for stitching shall be HDPE/PP tape or any other thread suitable for the purpose,compatible to the product being packed in the sack.The stitching shall be uniform without any loose threador knot.

3.6 Mouth of the Sack

The mouth of the sack shall be completely open andthe edges shall not fray.

3.7 Capacity

The sack shall have the nominal capacity of 25 to50 kg as decided by the buyer.

4 REQUIREMENTS

4.1 The sacks shall conform to the requirementsspecified in Table 1.

4.2 UV Resistance

The PP woven fabric of sack shall be made out of

IS 9755:2003

Table 1 Requirements of HDPE/PP Woven Sacks for Packing Fertilizers

( Clauses 3.2.1 and4.1 )

SINo.

(!)

i)

ii)

iii)

iv)

v)

vi)

vii)

Characteristic Requirement Tolerance Method of Test,

(2)

Dimensions (mm):

a) Length

b) Width

Ends per dm

Picks per dm

Mass of fabric, glm2

Average breaking strength offabric, A4in [ Ravened stripmethod, 325 mm x 70 mm’),Nz) (kgf) ]:

a) Length-wise

b) Width-wise

Minimum breaking strengthof bottom seam ( Stripmethod ), Min Nz)(kgf)

Elongation at break of fabric

Type 1 Type 11 Ref to IS No.

(3) (4)

As agreed tobetween the buyerand the seller

As agreed tobetween the buyerand the seller

40

40

88

680 (69)

850 (87)

310 (32)

( Ra;elled strip method ),percent:

a) Length-wise 20

b) Width-wise 20

NOTES

As agreed tobetween the buyerand the seller

As agreed tobetween the buyerand the seller

40

40

79

(5) (6)

Is 1954

+ 20 mm–lOmm

+ 20 mm–lOmm

● 2

*2

+ 60/0

IS 1963

1S 1963

1S 1964

1S 1969

600 (61) —

700 (71) —

310 (32) — Is 9030

IS 1969

20 *5

20 *5/

1 The sacks having width of less than 600 mm shall satisfy the requirements for Type 11sacks.

2 The suitable size ( inside dimensions ) of sacks of 50 kg capacity for low bulk density materials, such as urea is610 mm x 920 mm and for high bulk density material, such as super phosphate is 610 mm x 750 mm. These dimensionsprovide for optimum free space of minimum of 20 percent of length when measured along the surface of the fabric frommouth-stitch line of the sacks, up to the surface level of contents.

3 Tolerance on length and width are subject to the condition that inside area of the sack shall remain equal to the insidearea of specified dimensions.

1) Width after ravening = 50 mm and gauge length = 200 mm.2) 1 N = o, 10Z kgf ( approximately ).

UV stabilized material and shall have at least 50 percentof the original breaking strength when tested afterthe same has been exposed to UV radiation andweathering as per the method given in Annex B.

4.3 Mass

The mass of the sack shall be as agreed to betweenthe buyer and the seller or as declared by themanufacturer subject to the following tolerances:

a)

b)

Tolerance

On a bale of 500 sacks( excluding packingmaterial ): + 3 percent

On an individual sack : * 6 percent

2

4.3.1 The method of calculating the mass of thesacks is given in Annex C for guidance.

5 PRINTING, PACKING AND MARKING

5.1 Printing

The sacks shall be printed with the information asrequired by the buyer using suitable inks byflexography.

5.2 Packing

The sacks shall be packed to form a bale using a layerof HDPE/PP woven fabric and suitably secured. Thebale shall contain 500 sacks and multiple thereof.

IS 9755:2003

5.3 Marking

The bales shall be marked with the followinginformation:

a)

b)

c)

d)

e)

9

Name of the manufacturer,

Type and size of sacks,

Number of sacks,

Gross weight,

Net weight, and

Month and year of manufacture.

5.4 BIS Certification Marking

Each bale containing HDPE/PP sacks may also bemarked with the Standard Mark.

5.4.1 The use of the Standard Mark is governed bythe provisions of the Bureau of Indian Standards Act,

1986 and rules and regulations made thereunder. Thedetails of the conditions under which the licence forthe use of the Standard Mark may be granted tomanufacturers or producers maybe obtained from theBureau of Indian Standards.

6 SAMPLING AND CRITERIA FORCONFORMITY

6.1 Prior to test, the specimens shall be conditionedto moisture equilibrium from dry side in the standardatmosphere of 65 + 2 percent relative humidityand 27* 2°C temperature as laid down in IS 6359.

6.2 In any consignment, all the sacks of the sameconstruction shall be grouped together to constitutea lot.

6.3 The conformity of the lot to the requirements ofthe standard shall be determined on the basis of thetest carried out on the samples selected from it.

6.4 The number of bales to be selected dependson the size of the lot and shall be in accordance withCO12 and 3 of Table 2. The number of sacks to beselected from the bales sampled shall be in accordancewith COI4 of Table 2 for visual inspection, dimensions,ends, picks and mass requirements shall be inaccordance with CO15 of Table 2 for breaking loadof fabric, seam and percent elongation at breakrequirements,

6.5 Criteria for Conformity

The lot shall be considered as conforming to therequirements of the standard if the following conditionsare satisfied:

a)

b)

c)

d)

e)

The number of defective sacks in case ofvisual inspections, ends, picks anddimensions is up to 10 percent the samplesize after rounding off the fraction to nexthigher integer.

None of the sack or bale of 500 sacks weighless than the respective lower specified limitafter allowing tolerance of* 6 percent onindividual sack and + 3 percent on a bale of500 sacks ( see 4.3).

The average breaking load of fabric is notless than the value specified and none ofthe individual values is more than 10 percentbelow the specified value. The test for thelaminated sack shall be carried out on centreportion of the sack as well as at laminationjoint.

The seam strength of none of the sacks isless than the specified value.

None of the PP sacks samples after exposingto UV radiation and weathering shall havebreaking strength less than 50 percent of theoriginal breaking strength.

Table 2 Sample Size and Criteria for Conformity

( Clause 6.4)

SI No. of Bales No. of Bales to be Sample Size for VisualNo. in Lot Sampled Inspection, Dimensions,

Ends, Picks and MassRequirements

(1) (2) (3) (4)

i) Up to 25 3 13

ii) 26 to 50 5 20

iii) 51 to 100 8 32

iv) 100 and above 12 50

Sample Size forBreaking Strength of

Fabrics Before andAfter Exposing to UVRadiation, Breaking

Strength of Seam andElongation at Break

Requirements

(5)

8

8

13

20

3

IS 9755:2003

ANNEX A

IS No,

1954:1990

1963:1981

1964:2001

1969:1985

( Clause 2 )

LIST OF REFERRED INDIAN STANDARDS

Title

Determination of length and widthof woven fabrics — Methods( second revision)

Methods for determination ofthreadsper unit length in woven fabrics( second revision)

Textiles — Methods fordetermination of mass per unit lengthand mass per unit area of fabrics( second revision)

Methods for determination ofbreaking load and elongation ofwoven textile fabrics ( secondrevision )

IS No.

2508:1984

6192:1994

6359:1971

9030:1979

10789:2000

11197:1985

Title

Specification for low densitypolyethylene films ( second

revision )

Textiles — Monoaxially orientedhigh density polyethylene tapes —Specification ( second revision)

Method for conditioning of textiles

Method for determination of seamstrength of jute fabrics includingtheir laminates

Textiles — Stitch types —Classification and terminology(jirst revision)

Monoaxially oriented polypropylenetapes

ANNEX B

( Clause 4.2)

UV RESISTANCE TEST

B-1 To determine the effect of UV radiation andweathering on the breaking strength of the PP wovenfabric, the same shall be exposed as follows.

B-2 TEST CONDITIONS

The test shall be carried out with fluorescent UV —B lamp. The duration of the test shall be 144 h ( thatis 6 days ). The &.t cycle shall be 8 hat 60 + 3°C withUV radiation alternating with 4 h at 50 + 3°C

condensation.

B-3 TEST PROCEDURE

Specimens are alternately exposed to ultra violet lightalone and to condensation repeatedly. Condensationis produced by exposing the test surface to a heatedsaturated mixture of air and water vapour, while thereverse side of the test specimen is exposed to the

cooling influence of ambient room air.

1S 9755:2003

ANNEX C

( Clause 4.3.1 )

METHOD FOR CALCULATION OF

C-1 CALCULATION OF MASS OF SACKS

C-1.l Total mass of sacks comprises of

a) Mass of fabric,

b) Mass of stitching tape or threads, and

c) Mass of lamination.

C-1.l.l Calculate the mass of sacks with the help ofthe following formulae as the case may be:

a) Mass of tubular fabric:

i) Single fold stitching= (L+30mm)x2W’ xMx10-6

ii) Double fold stitching= (L+55mm)x2Wx Mx10-6

b) Mass of stitching tape or thread= L, XTX IO-6

c)

where

MASS OF SACKS

Mass of lamination:

i)

ii)

L.

L, =

w.

~.

T.

&f, .

I

i

1

1

I

Single fold stitching=( L+30mm)x2( W+5mrn)xM, x104

Double fold stitching=( L+55mm)x2( W+5mm)xM, x104

length of sack, in mm;

~pproximate length of stitching tape orthread, in mm;

width of sack, in mm;

mass of fabric, in g/m2;

linear density of stitching tape in tex; and

mass of lamination in g/m2.

ANNEX D

( Foreword)

COMMITTEE COMPOSITION

Textile Materials Made from Polyolefins ( Excluding Cordage ) Sectional Committee, TX 23

Organization Representative(s)

Bajaj Plastics Ltd, Nagpur SHRIVINOD K. BAJAJ( Chairman )SHRI K. N. BAISWAR( A/rernate )

All India Flat Tape Manufacturer’s Association, Bangalore SHRI LALIT K. TULSYAN

SHRI R. SWAMINATHAN( Alternate )

Dwarkadas Velji Talpatriwala, Mumbai SHRI HARISHV. THAKKAR

Gas Authority of India Ltd, New Delhi SHRIA. K. RAY

SHIU M. KHANIJELWAL( Alrernaze )

Gilt Pack Ltd, lndore SHRIJITESHACiRAWAL

SHRI SAURABHKALANI( Alternate )

Gujarut Heavy Chemicals Ltd, Junagarh, Gujamt SHRI R. S. PANDEY

SHRI R. K. GANDHI( Alternate )

Gujarat Narmada Valley Fertilizers Co Ltd, Narmadanagar SHRI B. M. SHARMA

SHRI G. M. PATEL( Alternate )

Haldia Petro Chemicals Ltd, Kolkata SHRI AMITAVASANYALSHRI RAJ K. DATTA( Alternate )

Indian Petrochemicals Limited, Vadodara SHRIJ. B. KAMATHSHRIV. C. FRANCIS( Alternate )

( Continued on page 6 )

5

IS 9755:2003

( c(ll?linl/c’d,frolll/ ?[lg<” 5 )

0r,qani:,ali(~17

lndlan Sugar find General Industry Export Import

Co!-porotiorr Ltd, New De[hl

Indian Sugar Mills Association. New Delhi

Larsen and Toubro Ltd, Mumbai

Ll(Jneeto Pl;]stic F:~b Pvt Ltd. Mumbai

National Council for Cement and Building Materials,

New Delhi

National FedeI-atlon of Co-opel-titive Factories L[d.

New Delhi

National Organic Chemical Industries Limited, Mumbai

Plastlc Woven Sficks Manufacturer’s Association, New Delhi

Rcliarrce Industries Ltd, Mrrmbai

SOOthern Petrochemical Industrws Corporation Ltd, Chennal

The All India Plastics Manufacturer’s Association, Mumbai

The Associated Cement Companies Ltd, Mtrmbai

The Fertilizer Association of India, New Delhl

Vijay Chemicals and Plastics Pvt Ltd, Vadodara

BIS Directorate General

Repre,sentfltive( .T)

SHI<I S. S. SII<OHI

SHRI K. K. SHA~MA

SHKI D, S. PATWA~I)HAN

SHRI R. P. S(X)CHAK( Alternate )

SHRI S. K. PACHISIA

SHRI NA~I:SH R. MUHTA( Alternate

DI{ C. RAIKLIMAR

SHI+IS. N. MI. HK[)TRA( Alternate )

SHI{I VINAY KU~AH

SH~I S. S. SIIWHI ( Ahernate )

SHIUV. K. SHA~MA

SHRI MANOJACARWAI.

D~ ALOK SAIK)O( Alternate )

DH Y. B. VASUOEU

SHIU L[. K. SWARWW( Alternate I )SHRI R. V. PRATAP( Alternate 11 )

SHRI S. VIJIiYAKUMAR

SHIUAZAIUAHW~NSTOIi( Alternate )

SH~I R. K. THJREWALA

SHRIVIJAYB. BOOI.ANI( Alternate )

SH~I D. K. SETT

Da S. K. SAXENA

D~ R. K. TLWATIA( Alternate )

SHRI V. SRI;LNIVASAN

SHRI N. StHNIVASAN ( Alternate )

SHIU P. BHATNACiAR.Director and Head ( TXD )[ Representing Director General

Member Secretary

SHkI B. L. BHARATI

Joint Director ( TXD ), BIS

Ex-qfficio ) ]

6

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Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewedperiodically; a standard along with amendments is reaffirmed when such review indicates that no changes areneeded; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standardsshould ascertain that they are in possession of the latest amendments or edition by referring to the latest issueof ‘BIS Catalogue’ and ‘Standards : Monthly Additions’.

This Indian Standard has been developed from Doc : No. TX 23 ( 0497 ),

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

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